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Shalnov [3]
3 years ago
10

Simplify (4i)(–5i)(6i) –120 –120i(incorrect) 120i 120

Mathematics
1 answer:
professor190 [17]3 years ago
4 0

Answer:

120i

Step-by-step explanation:

;i × i = -1....so hence

4i × (-5i) = -20 i^2...which is -20(-1) = 20....

then you multiply with 6i

20(6i) = 120i

You might be interested in
Which statement is true regarding the graphed functions?
RoseWind [281]

Answer:c. F(2)=g(-2)

Step-by-step explanation:

4 0
3 years ago
Greg studied for 12 minutes. This is 40% of the time he wants to study today. How many more minutes does Greg need to study toda
dolphi86 [110]

Answer:

18 More Minutes

Step-by-step explanation:

Hi,

I think I can help.

What I would first do here is try to find the value of 10% relative to the 12 minutes. If we find what 10% is we can multiply that to get 100% to find the total amount of minutes he wants to study. We can then subtract the time already studied to find our answer.

To do this we want to take the 40% we have and find 10. We can do 40/4 to find this since 40 divided by 4 is actually 10.

But if we do this we also have to do with to the number it is relating to / representing. Which is 12. (12 minutes = 40%)

So we can do :

40 / 4

=

10%

Also

12 / 4

=

3

So with this we can conclude that 10% of his total time is 3 minutes.

Now lets multiply this by 10 to get the 100% we are looking for so we can get the total amount of time he spent studying.

So :

10% x 10

=

100%

3 x 10

=

30 minutes

So his total time is 30 minutes of studying, but we have to find how many more minutes after his 12.

We can now simply take the total time and take off the time spent already to find this answer :

30 - 12

=

18 minutes

That is your answer, he needs to study 18 more minutes.

I hope this helps!

If you have any questions or concerns please comment or message me! :)

7 0
2 years ago
Javier bought a 20 ounce smoothie that contains 450 total calories. How many calories does the smoothie contain per ounce?
andre [41]

Answer:

22.5

Step-by-step explanation:

All you gotta do is 450 divided by 20 to get your answer of 22.5.

3 0
3 years ago
8 less than 4 times the number c is 20 what is the value of c
Brut [27]
Answer is 7


Work

4C-8= 20
+8
4C=28

28/4=7
8 0
3 years ago
Question is attached
RoseWind [281]

Answer: A, 63 minutes

Step-by-step explanation:

We can start by making this into two ratios. Isa finished 30% in 27 minutes, so 30/27 is our first ratio. We want to know how long it will take for the rest of the homework to be completed. 30% is finished already, which leaves 70% (100-30=70). The time left is x. Our second ratio is 70/x. Now, we can set the two ratios equal to each other to solve for x.

\frac{30}{27} = \frac{70}{x}

We can now cross multiply.

30x= 27(70)

Now, we simplify the right side.

30x= 1890

Divide both sides by 30 to isolate x.

x= 63

And there's your answer! Hope this helped!

5 0
2 years ago
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